30 BEEYCIDJi. 



Description of the specimen. — This species would belong to those 

 with the form of the body elevated but for its long and slender 

 caudal fin and the posterior part of the tail, which is narrower than 

 in other species, but stouter than in H. longipinne. 



The lower jaw is slightly prominent, and the upper maxillary 

 reaches nearly to below the middle of the eye. The length of the 

 snout is six-sevenths of the diameter of eye. The upper profile of 

 the head is slightly convex ; the two bony ridges between the eyes 

 run nearly parallel, and distant from one another, to receive in front 

 the groove for the processes of the intermaxillary bones, which is 

 equal in length to that of the snout. The fan-like expansion is 

 formed by about ten or eleven radiating ridges ; the turbinal bones 

 do not terminate in a prominent process. The diameter of the eye 

 is one-tliird of the length of head; the anterior suborbital has a 

 strong prominent tooth in front. The opercles are irregularly 

 striated. The operculum terminates in an uncommonly strong 

 spine, beneath which are several veiy small ones, not much larger 

 than the other denticulations of the margin. The sub- and inter- 

 operculum have foiu* or five small spinous teeth in their upper third ; 

 the remainder of the margins is entire. The prgeoperculum has a 

 vertical posterior margin, fmely serrated, and a strong and straight 

 .spine at the angle ; the lower margin is indistinctly serrated. 



The spines of the dorsal fin are strong, the second to fifth longest. 

 The soft dorsal is rather elongate ; the first ray is equal in length to 

 the fifth spine, the thii-d not quite twice as long, and the last one- 

 third only of the first. The upper lobe of the caudal fin is very 

 elongate, its length is 3f in the total ; the lower is 4|- in the same 

 length. Also the soft part of the anal fin is rather elongate, longer 

 than the tliird spine, but lower than the doreal. The pectorals are 

 much shorter than the elongate ventrals ; they reach to the level of 

 the sixteenth scale of the lateral line, whilst the extremity of the latter 

 corresponds to the twenty-first. 



The scales are distinctly serrated on all the posterior margin. 

 The coloration appears to have been red in life, with lighter longi- 

 tudinal bands ; the fins are now entirely uniform. 



inches, lines. 



Total length 10 11 



Height of the body 2 9i 



Length of the head 2 9^ 



Interspace between the eyes 4|^ 



Length of the snout 10 



of opercular spine 4i 



■ of pneopcrcular spine 6^ 



of third dorsal spine 1 3 



of fii'st dorsal ray 1 2\ 



of thii'd dorsal ray 1 9^ 



of last dorsal ray 4 



of superior caudal lobe 3 



of inferior caudal lobe 2 4 



of third anal spine 1 4^ 



